Aggressive pruning of a japonica pieris
I live in zone 5 and have a large japonica pieris lily of the valley type that I would like to prune back considerably. When is a good time to prune and will it survive taking in down a foot or two? Thanks.
Submitted by chassis2

Hi, Well that's pretty severe pruning for any plant. I would not recommend you take that much off. The best time to prune these is in the spring, just as they develop new growth, but if you must trim it back significantly, I'd do it gradually, maybe 6 inches per year.

Answered by doug.jimerson